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westmi 35.4K Views
Aug 11, 2025 5:02 PM

Costco Members: 5.64-lbs Optimum Nutrition Gold 100% Whey Protein Powder

$55

$63

12% off
+ Free Shippingat Costco Wholesale
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Deal Details
Costco Wholesale has for its Members: 5.64-lbs Optimum Nutrition Gold Standard 100% Whey Protein Powder for $54.99. Shipping is free.

Thanks to community member westmi for sharing this deal.

Note: This item may be available in-warehouse at a lower non-delivered price.

Available:Features:
  • 24G Protein
  • Protein Source: Blend of Whey Protein Isolate, Whey Protein Concentrate, & Hydrolyzed Whey Protein
  • 5.5g of Naturally Occurring BCAAs
  • 1g of Naturally Occurring EAAs
  • Gluten Free, rBST Free

Editor's Notes

Written by qwikwit | Staff
  • This price matches a previous and popular +84 Frontpage Deal from December.
  • This product has a rating of 4.7 out of 5 stars, based on customer reviews.
  • The sale is valid through 8/24/25. While supplies last. Limit 2 per member.
  • If you don't have a Costco Warehouse Membership, you can sign-up here

Original Post

Written by westmi
Community Notes
About the Poster
Deal Details
Community Notes
About the Poster
Costco Wholesale has for its Members: 5.64-lbs Optimum Nutrition Gold Standard 100% Whey Protein Powder for $54.99. Shipping is free.

Thanks to community member westmi for sharing this deal.

Note: This item may be available in-warehouse at a lower non-delivered price.

Available:Features:
  • 24G Protein
  • Protein Source: Blend of Whey Protein Isolate, Whey Protein Concentrate, & Hydrolyzed Whey Protein
  • 5.5g of Naturally Occurring BCAAs
  • 1g of Naturally Occurring EAAs
  • Gluten Free, rBST Free

Editor's Notes

Written by qwikwit | Staff
  • This price matches a previous and popular +84 Frontpage Deal from December.
  • This product has a rating of 4.7 out of 5 stars, based on customer reviews.
  • The sale is valid through 8/24/25. While supplies last. Limit 2 per member.
  • If you don't have a Costco Warehouse Membership, you can sign-up here

Original Post

Written by westmi

Community Voting

Deal Score
+73
Good Deal
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Top Comments

ShrewdHealth3620
3Comments
10Reputation
$49 in warehouse.
Go to Comment
Dmitry92
192Comments
39Reputation
I really hope Costco starts selling the Double Rich Chocolate flavor at some point. 🙏 It's the best chocolate protein I've ever tried, rich but not overly sweet. I usually grab the 10lb bag from Amazon whenever it's on sale.
Go to Comment
chandu1256
920Comments
155Reputation
This and it doesn't have Sucralose for those want to avoid it
Go to Comment

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81 Comments

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Aug 11, 2025 6:52 PM
354 Comments
Joined Aug 2011
broncohunterAug 11, 2025 6:52 PM
354 Comments
Quote from BrightPartner1992 View quoted comment :
If you look at the ingredients, this powder sucks.
This protein does not suck. It is more than adequate for 99% of the people that will buy it.
Aug 11, 2025 6:52 PM
160 Comments
Joined Mar 2011
nassersyedAug 11, 2025 6:52 PM
160 Comments
The price is great, Just to add a comment about the flavor. I find these two flavors to be overtly sweet. The double chocolate and French vanilla flavors have a "dull" sweetness to it. And those mix well with water.
Aug 11, 2025 6:54 PM
570 Comments
Joined Aug 2019
CrimsonCheetah9927Aug 11, 2025 6:54 PM
570 Comments
Quote from SensibleJuice669 View quoted comment :
FWIW, I've tried a lot of different protein powder in my life and extreme milk chocolate is one of the worst flavors I've had. It tastes very artificial and chemical and I will never get it again.
That's my flavor of choice I enjoy it. Optimum Nutrition doesn't blindly make these flavors and bring them to market, there's taste surveys- they stick with what a majority of people want/enjoy.
Last edited by CrimsonCheetah9927 August 11, 2025 at 11:56 AM.
1
Aug 11, 2025 7:06 PM
233 Comments
Joined Jul 2014
ericwarsAug 11, 2025 7:06 PM
233 Comments
So for the chocolate flavor:
32g a serving / 24g protein = 75% protein and conversely 25% filler


Did I do that right?
120 calories seems like a lot for just protein powder but i'll probably grab it at this price
Aug 11, 2025 7:12 PM
305 Comments
Joined Apr 2015
mriggleAug 11, 2025 7:12 PM
305 Comments
Quote from ericwars View quoted comment :
So for the chocolate flavor:
32g a serving / 24g protein = 75% protein and conversely 25% filler


Did I do that right?
120 calories seems like a lot for just protein powder but i'll probably grab it at this price
A g of protein has 4 calories. At 24g of protein thats 96 calories out of 120 calories per serving.
Aug 11, 2025 7:14 PM
354 Comments
Joined Aug 2011
broncohunterAug 11, 2025 7:14 PM
354 Comments
Quote from ericwars View quoted comment :
So for the chocolate flavor:
32g a serving / 24g protein = 75% protein and conversely 25% filler


Did I do that right?
120 calories seems like a lot for just protein powder but i'll probably grab it at this price
How is 120 calories a lot for 25g of protein? This is compoletely normal and less than many other poplar protein powders.
Aug 11, 2025 7:15 PM
50 Comments
Joined Apr 2011
eckohsaverAug 11, 2025 7:15 PM
50 Comments
Quote from Dmitry92 View quoted comment :
I really hope Costco starts selling the Double Rich Chocolate flavor at some point. 🙏 It's the best chocolate protein I've ever tried, rich but not overly sweet. I usually grab the 10lb bag from Amazon whenever it's on sale.
+1000. yes. I miss that flavor so much!

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Aug 11, 2025 8:00 PM
7 Comments
Joined Jun 2025
darkness2911Aug 11, 2025 8:00 PM
7 Comments
Got a 10lb for 93 after taxes few months ago…decent deal though..but waiting again for that Amazon killer
Aug 11, 2025 8:12 PM
806 Comments
Joined Dec 2011
ready4wardAug 11, 2025 8:12 PM
806 Comments
Quote from SensibleJuice669 View quoted comment :
FWIW, I've tried a lot of different protein powder in my life and extreme milk chocolate is one of the worst flavors I've had. It tastes very artificial and chemical and I will never get it again.
It's my favorite chocolate flavor protein out of anything I've tried at Costco but I've yet to try Levels and Ascent
Aug 11, 2025 8:15 PM
806 Comments
Joined Dec 2011
ready4wardAug 11, 2025 8:15 PM
806 Comments
Quote from HappyFaucet400 View quoted comment :
elaborate
Some people are scared of sucralose, others find that it tastes bad or upsets their stomach. I think the sucralose fears are incredibly unfounded, everyone cites the rat study where they fed the rats an insane amount of sucralose equivalent to hundreds of packets in a day for a human. The equivalent amount of sugar is way more harmful, but there's a trend in more premium protein powders to move to stevia + monkfruit. Personally I don't like the taste of stevia + monkfruit blends and prefer sucralose + ace-k.

If you are ok with the taste of sucralose and it tastes fine to you, then ON is a great protein powder. Been using ON for over a decade and the extreme milk chocolate is my favorite chocolate flavor.
Aug 11, 2025 8:30 PM
2.8K Comments
Joined Nov 2011
TaintAug 11, 2025 8:30 PM
2.8K Comments
Quote from HappyFaucet400 View quoted comment :
elaborate
Ace K. and whatever "Artificial Flavor" is.
1
Aug 11, 2025 9:05 PM
94 Comments
Joined Mar 2018
Dealhunter1257Aug 11, 2025 9:05 PM
94 Comments
How does this compare to the grass fed whey protein isolate from Costco?
Aug 11, 2025 9:23 PM
379 Comments
Joined May 2018
CrimsonFeather358Aug 11, 2025 9:23 PM
379 Comments
Quote from Dmitry92 View quoted comment :
I really hope Costco starts selling the Double Rich Chocolate flavor at some point. 🙏 It's the best chocolate protein I've ever tried, rich but not overly sweet. I usually grab the 10lb bag from Amazon whenever it's on sale.
Same here, but I'm not holding my breath 🙁I've been buying my protein from Costco since they opened in my location back in 2019 and it's always been this and the vanilla flavor, never anything else.
Aug 11, 2025 9:28 PM
603 Comments
Joined Jul 2022
FairWriter8849Aug 11, 2025 9:28 PM
603 Comments
At over 5.5 lbs I thought this stuff would last forever. I told my wife when it finally ran out and she said, "No whey"
3

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Aug 11, 2025 9:31 PM
379 Comments
Joined May 2018
CrimsonFeather358Aug 11, 2025 9:31 PM
379 Comments
Quote from ready4ward View quoted comment :
It's my favorite chocolate flavor protein out of anything I've tried at Costco but I've yet to try Levels and Ascent
Highly recommend Ascent's chocolate from Costco if you can find it (my store stopped stocking it for some reason,) since the price is great compared to MSRP/elsewhere. Slightly more expensive per serving than ON, but it was a premium I was willing to pay for cleaner ingredients and a better consistency when mixed. It's really sweet, though. I think they should've called it Chocolate Marshmallow, to give you an idea of the flavor/sweetness.

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